I had sinus surgery on 7 May 2012. On 10 May 2011 – my ENT told me to begin using the sinus rinse three times a day – which I had without any issues.

I had sinus surgery on 7 May 2012. On 10 May 2011 - my ENT told me to begin using the sinus rinse three times a day - which I had without any issues. Note: I have used NeilMed Sinus Rinse since suggested by in ENT in Sept 2011. With that said - it is second nature for me to shake the solution before using. Today - I experienced a stinging seinsation that went from the nostril up the forward and towards the back. Can this happen if I forgot to shake the solution? I have never had any issues during the few months. Thank You.